ML19312B717

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Forwards Request for Addl Info Re Amend 8 to Application for License Incorporating by Ref B&W Aug 1969 rept,BAW-10014. Info Needed to Evaluate Operation Potential at Sustained Departure from Nucleate Boiling
ML19312B717
Person / Time
Site: Oconee  
Issue date: 11/28/1969
From: Morris P
US ATOMIC ENERGY COMMISSION (AEC)
To: Thies A
DUKE POWER CO.
References
NUDOCS 7911180037
Download: ML19312B717 (2)
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DR Reading DRL Reading l

Docket Noe. 50-269 RP3-3 Reading 50-270 C. K. Beck i

and 50-287 M. M. Mann P. A. Morris i

r. Schroeder T. R. Wilson I

Duke Power Company R. S. Boyd Power Building S. Levine (14) 422 South Church Street D. Skovholt Charlotte, North Carolina R. DeToung 28201 RP Branch Chiefs Attention:

RD Branch Chiefs Mr. Austin C. Thies L. Kornblith l

Vice President FWKaras (2)

Production & Operation A. Schwencer Centlemen:

Nuclear Station incorporated by reference Babcoc e Oconee Topical Report N10014 " Analysis of Sustained Depart eos Nucleate Boiling Operation" dated August 1969 ure from with you at our meeting on September As discussed additional information in order to evaluate the potential f 24, 1969, we require i

operation at sustained DNB in the Oconee reactore and the pot or for DNB conditions to propagate with associated cladding ' il ential f

i a ures.

The additional information should be provided as an a to your appMestion or as a revision to BAW-10014 imendamnt into your 4 plication by reference.

nc<.:lerated elude the information named in the attached enclosureYour response shou mation to Be Supplied on Sustained DNB."

, "Infor-i Sincerely, l

Peter A. Morris, Director Division of Reactor Licensing Encleeure:

Request for Adelitional Information i

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INFORMATION TO BE SUPPLIED ON SUSTAINED DNB 1.

Provide a discussion of relevant experimental and operational data on sustained DNB available in the literature and in B&W's experimental programs.

2.

Provide a list of the mechanisms that might cause high heat flux leading to sustained DNB operation in the Oconee reactors (e.g.

misplaced fuel assemblies).

Include a discussion of the lo-cation and magnitude of these high heat fluxes and an analysis of the precautionary measures and design features of the Oconee rea-tors which limit the possibility and consequences of high heat fluxes leading to sustained DNB.

3.

Provide additional analysis and documentation of the local consequences to irradiated fuel elements caused by sustained DNB operation (e.g. accelerated cladding corrosion, fatigue, rod swelling, rod bowing).

Include an analysis of the pos-sibility and extent of DNB propagation caused by associated cladding failure.

4.

Provide an analysis of the methods available in the Oconee reactors to detect operation at sustained DNB.

5.

Provide a discussion of how accidents, transients, and the function of engineered safeguards would be affected by operation at sustained DNB.

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Amendomet me. 8 to year appliestion' for licenses for the Oconee Weslear Station-ineerporated by reference Babcock & Wilcox-S.

  1. ' Topical tapert Bas-10014 "Analysia of Sustained Departure from Y,O eeleste.Beiling operaties" dated August 1969. As discussed R

M' with yee 'at eer:meetta(em 'Septeeber 24, 1969, we require i

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'W;,y / 'metion to Se Supplied.on,Seetsined DNB."

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INF0P}!ATION TO BE SUPPLIED ON SbSTAINED DNB 1.

Provide a discussion of relevant experimental and operational data on sustaited DNB available in the literature and in B&W's experimental rrograms.

2.

Provide a list of the mechanisms that might cause high heat flux

. leading to sustained DNB operation in the Oconee reactors (e.g.

misplaced fuel assemblies).

Include a discussion of the lo-cation and magnitude of these high heat fluxes and an analysis of the precautionary measures and design features of the Oconee rea-tors which limit the possibility and consequences of high heat i

fluxes leading to sustained DNB.

3.

Provide additional analysis and documentation of the local consequences to irradiated fuel elements caused by sustained i

DNB operation (e.g. accelerated cladding corrosion, fatigue, rod swelling, rod bowing).

Include an analysis of the pos-sibility and extent of DNB propagation caused by associated cladding failure.

4.

Frovide an analysis of the methods available in the Oconee reactors to detect operation at sustained DNB.

5.

Provide a discussion of how accidents, transients, and the function of engineered safeguards would be affected by operation at sustained DNB.

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